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Finding the Fourth Proportional to 281.93, 388.39 and 229.33

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Solution

The fourth proportional to 281.93, 388.39 and 229.33 is: 315.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.93 : 388.39 = 229.33 : x
  2. Step 2: Convert to fraction form
    281.93/388.39 = 229.33/x
  3. Step 3: Cross multiply
    281.93x = 388.39 × 229.33
  4. Step 4: Simplify right side
    281.93x = 89,067.93
  5. Step 5: Solve for x
    x = 89,067.93/281.93
  6. Step 6: Final answer
    x = 315.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.